JP7401830B2 - Work waiting prediction device, method, and system - Google Patents

Description

The present disclosure relates to a work waiting prediction device, method, and system.

BACKGROUND ART Conventionally, on a factory production line, when each worker determines that work is stagnant, he or she calls a work assistant (also called a relief man) to keep the production line from stopping.

Patent No. 3269257

However, in order to determine whether the work is stagnant, the worker must consider not only his own work situation but also the preceding and succeeding processes. Since calling a work assistant depends on the worker's judgment ability, there is a delay in the worker calling the work assistant, which may cause the production line to stop.

The present disclosure aims to prevent a production line from stopping due to stagnation of workers' work.

The work waiting prediction device according to the first aspect of the present disclosure includes:
A device equipped with a control unit that predicts waiting time for work,
The work object, which is the object of the work, is transported to a subsequent process according to instructions from the worker,
The control unit includes:
Obtaining placement information of the work object,
The presence or absence of waiting time in each process is predicted based on the standard amount of work for each work object in each process and the arrangement information.

According to the first aspect of the present disclosure, since the occurrence of waiting is predicted in advance, it is possible to prevent the production line from stopping due to stagnation in the work of workers.

A second aspect of the present disclosure is the work waiting prediction device according to the first aspect, comprising:
The placement information includes the placement of the work object between the process preceding the process of predicting the presence or absence of waiting and the process of predicting the presence or absence of waiting, and the process preceding the process of predicting the presence or absence of waiting. It includes a process for predicting whether or not there will be a wait, and the transport order of work objects to be transported.

According to the second aspect of the present disclosure, the occurrence of waiting can be predicted in advance based on the current arrangement of work objects.

A third aspect of the present disclosure is the work waiting prediction device according to the first or second aspect, comprising:
The standard work amount is the time required for the work created from the actual work time of each worker, or a preset standard work time.

According to the third aspect of the present disclosure, the occurrence of waiting can be predicted in advance based on the actual working time of the worker or the predetermined working time.

A fourth aspect of the present disclosure is the work waiting prediction device according to any one of the first to third aspects,
Standards for each workpiece in the process preceding the process that predicts waiting, during the period until the workpiece that is predicted to cause waiting is brought into the process that predicts the presence or absence of waiting. The presence or absence of waiting in each process is predicted by calculating the difference between the total amount of work and the total of the standard workload of each work object in the process in which waiting is predicted.

According to the fourth aspect of the present disclosure, the occurrence of waiting is determined in advance based on the total amount of work in the process to be predicted and the total amount of work in the process before the process to be predicted. can be predicted.

A fifth aspect of the present disclosure is the work waiting prediction device according to any one of the first to fourth aspects,
The standard work amount includes the difference between the work start time and the work end time, the work time obtained by image processing, the work time measured in advance with a stopwatch, the standard work time, and the total time of the element work time, There is either a preset working time.

According to the fifth aspect of the present disclosure, various reference workloads can be used.

A sixth aspect of the present disclosure is the work waiting prediction device according to any one of the first to fifth aspects,
The method further includes the step of recording whether or not there will be waiting in each of the predicted processes, and identifying a process in which waiting is likely to occur.

According to the sixth aspect of the present disclosure, it is possible to improve the production line.

A method according to a seventh aspect of the present disclosure comprises:
A method executed by a control unit of a work waiting prediction device that predicts work waiting, the method comprising:
The work object, which is the object of the work, is transported to a subsequent process according to instructions from the worker,
acquiring placement information of the work object;
The method includes a step of predicting whether or not there is a waiting period in each process based on the standard amount of work for each work object in each process and the arrangement information.

A work waiting prediction system according to an eighth aspect of the present disclosure includes:
A system including a work waiting prediction device and a work assistant terminal,
The work object, which is the object of work, is transported to the subsequent process according to instructions from the worker.
The control unit of the work waiting prediction device includes:
Obtaining placement information of the work object,
Predicting the presence or absence of waiting time in each process based on the standard workload of work on each work target in each process and the placement information,
The work assistant's terminal is notified of the process in which waiting is expected.

According to the ninth aspect of the present disclosure, the work assistant can know in advance which steps will require waiting.

FIG. 1 is a diagram showing an overall configuration according to an embodiment of the present disclosure. FIG. 1 is a hardware configuration diagram of a work waiting prediction device according to an embodiment of the present disclosure. FIG. 2 is a flowchart of work waiting prediction processing according to an embodiment of the present disclosure. FIG. It is a flowchart of calculation processing of waiting time for work according to an embodiment of the present disclosure. FIG. 2 is a functional block diagram of a control unit according to an embodiment of the present disclosure. FIG. 3 is a diagram for explaining placement information of a work object according to an embodiment of the present disclosure. FIG. 3 is a diagram for explaining the standard amount of work for each work object in each process according to an embodiment of the present disclosure.

Embodiments of the present disclosure will be described below based on the drawings.

<Explanation of terms>
- In this specification, "waiting" is a state in which there is no work target for the worker to work on.
- In this specification, a "work target" is any product that is a work target, such as an air conditioner.

The prediction of pending work according to the present disclosure is based on the prediction that the work object that is the object of the work is instructed by the worker (for example, when the work on the work object in the worker's own process is completed, the work object is shall be applied to a production line that is conveyed to a subsequent process in accordance with instructions for conveyance to a subsequent process.

<Overall configuration>
FIG. 1 is a diagram showing the overall configuration according to an embodiment of the present disclosure. The work waiting prediction system 1 includes a work waiting prediction device 10 and a work assistant terminal 20. The work waiting prediction device 10 and the work assistant terminal 20 can transmit and receive data via any network.

＜＜Work waiting prediction device＞＞
The work waiting prediction device 10 is a device that predicts waiting work. Specifically, the work waiting prediction device 10 acquires the arrangement information of the work objects, and performs the work in each process based on the reference work amount of each work object in each process and the arrangement information. Predict whether there will be a waiting list. Furthermore, the work waiting prediction device 10 can notify the work assistant terminal 20 of the process in which waiting is predicted (for example, by displaying it on a screen, outputting a voice, etc.). Note that the work waiting prediction device 10 is composed of one or more computers.

<<Work assistant terminal>>
The work assistant terminal 20 is a terminal operated by a work assistant (also called a relief man) 21. Specifically, the work assistant terminal 20 receives a notification from the work waiting prediction device 10 of a process in which a waiting time is predicted (for example, display on a screen, outputting a voice, etc.). For example, the work assistant terminal 20 is a wearable terminal (for example, a smart watch), a smartphone, a tablet, or the like.

<Hardware configuration>
FIG. 2 is a hardware configuration diagram of the work waiting prediction device 10 according to an embodiment of the present disclosure.

The work waiting prediction device 10 includes a control unit 101, a ROM (Read Only Memory) 102, and a RAM (Random Access Memory) 103. The control unit 101, ROM 102, and RAM 103 form a so-called computer. Further, the work waiting prediction device 10 can include an auxiliary storage device 104, a display device 105, an operating device 106, an I/F (Interface) device 107, and a drive device 108. Note that each piece of hardware of the work waiting prediction device 10 is interconnected via a bus 109.

A control unit (for example, a CPU (Central Processing Unit)) 101 is an arithmetic device that executes various programs installed in the auxiliary storage device 104. Each process described in this specification is performed by the control unit 101 executing the program.

ROM 102 is a nonvolatile memory. The ROM 102 functions as a main storage device that stores various programs, data, etc. necessary for the control unit 101 to execute various programs installed in the auxiliary storage device 104. Specifically, the ROM 102 functions as a main storage device that stores boot programs such as BIOS (Basic Input/Output System) and EFI (Extensible Firmware Interface).

The RAM 103 is a volatile memory such as DRAM (Dynamic Random Access Memory) or SRAM (Static Random Access Memory). The RAM 103 functions as a main storage device that provides a work area in which various programs installed in the auxiliary storage device 104 are expanded when executed by the control unit 101.

The auxiliary storage device 104 is an auxiliary storage device that stores various programs and information used when the various programs are executed.

The display device 105 is a display device that displays the internal state of the work waiting prediction device 10 and the like.

The operating device 106 is an input device through which the operator of the work waiting prediction device 10 inputs various instructions to the work waiting prediction device 10.

The I/F device 107 is a communication device that connects to a network and communicates with other devices.

The drive device 108 is a device for setting the recording medium 110. The recording medium 110 herein includes a medium for recording information optically, electrically, or magnetically, such as a CD-ROM, a flexible disk, or a magneto-optical disk. Further, the recording medium 110 may include a semiconductor memory or the like that electrically records information, such as a ROM or a flash memory.

Note that the various programs to be installed in the auxiliary storage device 104 are installed by, for example, setting the distributed recording medium 110 in the drive device 108 and reading out the various programs recorded on the recording medium 110 by the drive device 108. be done. Alternatively, various programs to be installed in the auxiliary storage device 104 may be installed by being downloaded from a network via the I/F device 107.

<Processing method>
Hereinafter, the work waiting time prediction process will be described with reference to FIG. 3, and the work waiting time calculation process will be described with reference to FIG.

FIG. 3 is a flowchart of work waiting prediction processing according to an embodiment of the present disclosure.

In step 1 (S1), the control unit 101 acquires placement information of a work target.

In step 2 (S2), the control unit 101 predicts the presence or absence of waiting time in each process based on the standard workload of each work object in each process and the placement information acquired in S1. do.

Specifically, the control unit 101 calculates the waiting time in each process, and based on the waiting time, determines whether there is waiting (that is, it is predicted that waiting will occur) or whether waiting is expected to occur. Determine whether there is any waiting (that is, it is predicted that no waiting will occur).

After S2, the control unit 101 records the presence or absence of waiting in each process predicted in S2 in an arbitrary memory, and records the presence or absence of waiting in each process predicted in S2, and selects processes where waiting is likely to occur (for example, it is predicted that waiting will occur). It is possible to specify a process in which the number of times the process has been performed is greater than or equal to a predetermined number of times.

FIG. 4 is a flowchart of calculation processing of work waiting time according to an embodiment of the present disclosure. Note that the work waiting time may be calculated each time a work object is brought in (that is, each time a work object for which it is predicted whether or not to cause a waiting time is brought in).

In step 11 (S11), the control unit 101 controls the control unit 101 during a period until a work object (a work object for which it is predicted whether or not to cause a waiting period) is brought into the process of predicting the presence or absence of a waiting period. Calculate the total standard work amount of each work object in the previous process of the process for which waiting time is predicted.

In step 12 (S12), the control unit 101 controls the control unit 101 for the period until the work object (the work object for which it is predicted whether or not to cause waiting) is brought into the process of predicting whether there will be waiting. Calculate the total standard work amount for each work object in the process for which waiting time is predicted.

Note that S11 and S12 may be executed in reverse or at the same time.

In step 13 (S13), the control unit 101 calculates the difference between the sum of S11 and the sum of S12. This difference becomes the waiting time (that is, if the total of S11 = <the total of S12, the waiting time is zero, and if the total of S11 > the total of S12, the difference becomes the waiting time) .

FIG. 5 is a functional block diagram of the control unit 101 according to an embodiment of the present disclosure. The control unit 101 can include a waiting calculation unit 1001 and a waiting presence determining unit 1002. Further, the control unit 101 functions as a waiting calculation unit 1001 and a waiting presence determining unit 1002 by executing a program (for example, a program recorded on a computer-readable recording medium).

The waiting calculation unit 1001 calculates the waiting time in each process (that is, all processes). Specifically, the waiting calculation unit 1001 calculates the waiting time in each process based on the standard workload of each work object in each process and the arrangement information of the work object. . Before explaining the calculation of the waiting time in detail, the standard amount of work for each work object in each process and the arrangement information of the work objects will be explained.

<<Standard amount of work for each work object in each process>>
FIG. 6 is a diagram for explaining the standard amount of work for each work object in each process according to an embodiment of the present disclosure.

Each work object (work object 1, ..., work object x, ...) in each process (process 1, ..., process N-1, process N, process N+1, ...) , work target y, . . . ) is used to predict the waiting time for work. Note that work objects 1, . . . , work objects x, . . . , work objects y, . Such standard work amount data is stored in an arbitrary memory.

For example, the standard work amount is the time required for the work created from the actual work time for each worker (actual work time data 1012 in FIG. 5), or the standard work time set in advance. The standard work amount is determined by the difference between the work start time and work end time, the work time obtained by image processing, the work time measured in advance with a stopwatch, the standard work time, the total time of the element work time, and the work time obtained in advance. It may be either the set working time or.

＜＜Work object placement information＞＞
FIG. 7 is a diagram for explaining placement information of work objects according to an embodiment of the present disclosure. Each worker (worker 1,..., worker N-1, worker N, worker N+1...) performs each process (process 1, ..., process N-1, process N , process N+1, . . . ), it is assumed that each work object is being worked on. Between each process, there is a space where work objects waiting to be worked are placed (a space where work objects waiting to be worked in process N are placed (i.e. between process N-1 and process N). ) is the waiting space N). Note that an arbitrary number (zero or one or more) of work objects are placed in each waiting space.

The information on the placement of work objects includes the placement of work objects between the previous process of the process that predicts the presence or absence of waiting and the process that predicts the presence or absence of waiting (in other words, the waiting space), and the presence or absence of waiting. The transport order of work objects to be transported to the previous process of the predicted process and the process of predicting the presence or absence of waiting (that is, work target 1,..., work target x,..., work target y,...).

Returning to the explanation of the waiting calculation unit 1001 in FIG. 5. It may be possible to predict whether or not there will be a waiting period in each process each time a workpiece is brought in. In other words, when a certain work object is brought in (for example, we will explain the case where work object 1 in Fig. 7 is brought into process 1), it is predicted whether or not there is a waiting time in each process (that is, all processes). (In other words, in this case, it is predicted whether or not the work object 1 will cause a waiting period).

Specifically, the waiting calculation unit 1001 calculates the period until the work object (work object 1) is brought into the process (in other words, the process The sum of the standard workload of each workpiece in the previous process (process N-1) of the process for which waiting is predicted during the period from an arbitrary position before N to the time it is carried into process N, and the amount of manual work The period until the work object (work object 1) is carried into the process (process N) for which the presence or absence of waiting is predicted (in other words, the period until it is carried into the process N from any position before process N) The difference between the sum of the standard work amounts of each work object in the process (process N) in which waiting time is predicted is calculated.

Note that the period from when workpiece 1 is carried into process N from an arbitrary position before process N is, for example, the period from when workpiece 1 is carried into the production line until it is carried into process N. but not limited to.

[Total standard workload in the previous process] and [Total standard workload in the prediction process] will be described below with reference to FIG. 7. The transport order of work objects is work object 1, work object 2, ..., work object x (work object being worked on in process N-1), ..., work object y (process object Suppose that the work object being worked on at N), . . .

[Total standard work amount in previous process]
The waiting calculation unit 1001 calculates the standard work amount in process N-1 of the work object 1 + the standard work amount in process N-1 of the work object placed in the waiting space 2 + ... + waiting space The standard amount of work in process N-1 of the workpiece placed in N-1 + the standard amount of work in process N-1 of workpiece x is the sum of the standard amount of work in the previous process (that is, The presence or absence of waiting is predicted during the period until the work object (work object 1) is carried into the process (in other words, the period until it is carried into process N from an arbitrary position before process N). The total amount of standard work for each work object in the previous process of the process for which waiting is predicted).

[Total standard work amount in forecast process]
The waiting calculation unit 1001 calculates the standard amount of work in process N for the workpiece placed in waiting space 2+...+the standard in process N for the workpiece placed in waiting space N-1. Work amount + standard work amount in process N of work object x + standard work amount in process N of work object placed in waiting space N + standard work amount in process N of work object y, The total amount of standard work in the predicted process (in other words, the period until the work object (work object 1) is brought into the process whose waiting status is predicted (in other words, the period from any position before process N to the process The total amount of standard work for each work object in the process for which waiting time is predicted (period until it is delivered to N).

The calculation of the total standard workload in the previous process and the calculation of the total standard workload in the prediction process are performed in all processes.

The waiting presence determination unit 1002 determines, based on the waiting time calculated by the waiting calculation unit 1001, whether there is waiting (that is, it is predicted that waiting will occur) or there is no waiting (that is, it is predicted that waiting will occur). , it is predicted that no waiting will occur).

<<Judgment example 1>>
For example, if the waiting time calculated by the waiting calculation unit 1001 is not zero, the waiting presence determination unit 1002 can determine that there is waiting (that is, waiting is predicted to occur). .

<<Judgment example 2>>
For example, if the waiting time calculated by the waiting calculation unit 1001 is longer than a threshold, the waiting presence determination unit 1002 may determine that there is waiting (that is, waiting is predicted to occur). can.

<Use of work progress information>
In an embodiment of the present disclosure, the waiting calculation unit 1001 can calculate the waiting time using work progress information (that is, the amount of work that has already been completed).

Specifically, when the work object is brought in (for example, when work object 1 in FIG. 7 is brought into process 1), the waiting calculation unit 1001 calculates the waiting time in the previous process of the process that predicts the waiting time. The amount of work that has already been completed in (Process N-1) is the sum of the standard amount of work in the previous process (in other words, the period until the workpiece is brought into the process for which waiting time is predicted). Subtracted from the total standard work amount of each work object in the previous process of the process for which waiting time is predicted. Similarly, the waiting calculation unit 1001 calculates the waiting time in the step (process N) of predicting the waiting time when the work object is brought in (for example, when the work object 1 in FIG. 7 is brought into the process 1). The amount of work that has already been completed is calculated as the total standard amount of work in the prediction process (in other words, in the process that predicts the waiting time during the period until the workpiece is delivered to the process that predicts the presence or absence of the waiting time). subtracted from the total standard work amount for each work object).

In this way, by making corrections based on the progress of work in each process, it is possible to take into account the difference in delivery time for each process, and it is possible to improve the accuracy of predicting the presence or absence of waiting.

Although the embodiments have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the claims.

1 Work waiting prediction system 10 Work waiting prediction device 20 Work assistant terminal 21 Work assistant 101 Control unit 102 ROM
103 RAM
104 Auxiliary storage device 105 Display device 106 Operating device 107 I/F device 108 Drive device 109 Bus 110 Recording medium 1001 Waiting calculation unit 1002 Waiting presence determining unit 1011 Work object placement information 1012 Actual work time data

Claims (8)

A device equipped with a control unit that predicts waiting time for work,
The work object, which is the object of the work, is transported to a subsequent process according to instructions from the worker,
The control unit includes:
Obtaining placement information of the work object,
A work management system that predicts the presence or absence of waiting time in each process based on the standard workload of each work target in each process, the arrangement information , and the amount of work that has already been completed in each process . Wait prediction device. The placement information includes the placement of the work object between the process preceding the process of predicting the presence or absence of waiting and the process of predicting the presence or absence of waiting, and the process preceding the process of predicting the presence or absence of waiting. 2. The work waiting prediction device according to claim 1, further comprising: a step of predicting whether or not there is a waiting state; and a transport order of work objects to be transported. 3. The work waiting prediction device according to claim 1, wherein the standard work amount is a time required for the work created from the actual work time of each worker, or a preset standard work time. Each workpiece in the process preceding the process that predicts waiting during the period until the workpiece that is predicted to cause waiting is brought into the process that predicts the presence or absence of waiting. Claim: Predicting the presence or absence of waiting in each process by calculating the difference between the total standard workload and the total standard workload of each work object in the process for predicting waiting. The work waiting prediction device according to 1 or 2. The standard work amount includes the difference between the work start time and the work end time, the work time obtained by image processing, the work time measured in advance with a stopwatch, the standard work time, and the total time of the element work time, The work waiting prediction device according to claim 1 or 2, wherein the work waiting prediction device has a preset work time. The control unit includes:
The work waiting prediction device according to claim 1 or 2, wherein the predicted presence or absence of waiting in each process is recorded, and a process in which waiting is likely to occur is identified. A method executed by a control unit of a work waiting prediction device that predicts work waiting, the method comprising:
The work object, which is the object of the work, is transported to a subsequent process according to instructions from the worker,
acquiring placement information of the work object;
a step of predicting the presence or absence of waiting time in each process based on the standard workload of each work object in each process, the arrangement information, and the amount of work that has already been completed in each process ; method including. A system including a work waiting prediction device and a work assistant terminal,
The work object, which is the object of work, is transported to the subsequent process according to instructions from the worker.
The control unit of the work waiting prediction device includes:
Obtaining placement information of the work object,
Predicting the presence or absence of waiting in each process based on the standard workload of each work object in each process, the arrangement information, and the amount of work that has already been completed in each process ,
A work waiting prediction system that notifies the work assistant's terminal of a process in which waiting is expected.

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